According to 90min, West Ham is negotiating two contracts with Sao Paulo for the January transfer window.
Ahead of his scheduled medical, Luizao, who arrived in England on Monday, already has a three-and-a-half-year contract with the Hammers.
Despite spending over £150m during the summer transfer window, the Hammers have struggled in the league this year.
Moyes still needs more new faces at the back despite bringing in several new people and strengthening the defense in particular.
